1581103289445 has 8 divisors (see below), whose sum is σ = 2529765263136. Its totient is φ = 843255087696.

The previous prime is 1581103289413. The next prime is 1581103289449. The reversal of 1581103289445 is 5449823011851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1581103289445 - 2⁵ = 1581103289413 is a prime.

It is a super-2 number, since 2×1581103289445² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1581103289449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52703442967 + ... + 52703442996.

It is an arithmetic number, because the mean of its divisors is an integer number (316220657892).

Almost surely, 2^{1581103289445} is an apocalyptic number.

1581103289445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1581103289445 is a deficient number, since it is larger than the sum of its proper divisors (948661973691).

1581103289445 is a wasteful number, since it uses less digits than its factorization.

1581103289445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105406885971.

The product of its (nonzero) digits is 1382400, while the sum is 51.

The spelling of 1581103289445 in words is "one trillion, five hundred eighty-one billion, one hundred three million, two hundred eighty-nine thousand, four hundred forty-five".